{ pkgs, ... }:

let
  fetchpatch = pkgs.fetchpatch;
  commit = "f69eefacf7304857f8c0ce7ac0ebf4971121da72";
  mkPatch = name: sha256: {
    name = name;
    patch = fetchpatch {
      name = name + ".patch";
      url = "https://raw.githubusercontent.com/linux-surface/linux-surface/${commit}/patches/5.13/${name}.patch";
      sha256 = sha256;
    };
  };
in {
  environment.etc."ipts.conf".text = ''
    [Config]
    BlockOnPalm = true
  '';

  powerManagement = {
    enable = true;
    cpuFreqGovernor = "powersave";
  };
  hardware.video.hidpi.enable = true;
  
  systemd.services.iptsd = {
    description = "Userspace daemon for Intel Precise Touch & Stylus";
    wantedBy = [ "multi-user.target" ];
    wants = [ "dev-ipts-15.device" ];
    after = [ "dev-ipts-15.device" ];
    serviceConfig = {
      Type = "simple";
      ExecStart = "${pkgs.iptsd}/bin/iptsd";
    };
  };
  environment.systemPackages = with pkgs; [ iptsd surface-control ];
  services.udev.packages = with pkgs; [ iptsd surface-control ];

  boot = {
    kernelPackages = pkgs.linuxPackages_5_13;
    kernelPatches = [
      (mkPatch "0001-surface3-oemb" "1h5f4qgrv74x8q02f29xfia9imcm6svh5gv5vb5izxx6w5i6c9fh")
      #(mkPatch "0002-mwifiex" "1qn5lqhbg67j1226msiijq42zdjwmvxzyfd5q366hlczcsw7a7r2")
      (mkPatch "0003-ath10k" "0zwyb1vksh6sjbwy5fp2c108m6fqzrv78cz3a296cff550ldn0fj")
      (mkPatch "0004-ipts" "0ap5li17zyvba1zx4ryyyk42m00rg5ympj2n24g5ylrld0n2xc3x")
      (mkPatch "0005-surface-sam-over-hid" "1vm4v84zbyiiqwby3cr7n8ffibx072rb7rhrl5hv37dsdr03gsa3")
      (mkPatch "0006-surface-sam" "1fi0w9bnfnwllmypk3llc58dmfsvx34772g8c52dgi4h9wsgnbhj")
      (mkPatch "0007-surface-hotplug" "0g3fkc12pc15aqq6nqk1zfp99lj1wj7cgc1n9691bp8fhqx5aj28")
      (mkPatch "0008-surface-typecover" "0803nd0w5rv17kwk3y577pm22zwzpcb52ddlkanm7jrbsrhk130f")
      #(mkPatch "0009-cameras" "1i5c16bx8drzagv5nkvmsyixvsz3w75lblabsmgxlh1znxsh7cj5")
      (mkPatch "0010-amd-gpio" "0qibdak0ivsch0r5kxd5hhmvw7rd75xy9mmxjbcmysv8q2y9m6hn") # TODO: Maybe drop
      (mkPatch "0011-amd-s0ix" "0awv32wqwkjsxs1bhg82rqq3c4ni2f9vsdm7iscilbad28ngdab8") # TODO: Maybe drop

      {
        name = "surface-config";
        patch = null;
        # Options from https://github.com/linux-surface/linux-surface/blob/master/configs/surface-5.13.config
        extraConfig = ''
        #
        # Surface Aggregator Module
        #
        SURFACE_AGGREGATOR m
        SURFACE_AGGREGATOR_ERROR_INJECTION n
        SURFACE_AGGREGATOR_BUS y
        SURFACE_AGGREGATOR_CDEV m
        SURFACE_AGGREGATOR_REGISTRY m

        SURFACE_ACPI_NOTIFY m
        SURFACE_DTX m
        SURFACE_PLATFORM_PROFILE m

        SURFACE_HID m
        SURFACE_KBD m

        BATTERY_SURFACE m
        CHARGER_SURFACE m

        #
        # Surface Hotplug
        #
        SURFACE_HOTPLUG m

        #
        # IPTS touchscreen
        #
        # This only enables the user interface for IPTS data.
        # For the touchscreen to work, you need to install iptsd.
        #
        MISC_IPTS m

        #
        # Cameras: IPU3
        #
        #VIDEO_IPU3_IMGU m
        VIDEO_IPU3_CIO2 m
        CIO2_BRIDGE y
        #INTEL_SKL_INT3472 m

        #
        # Cameras: Sensor drivers
        #
        #VIDEO_OV5693 m
        VIDEO_OV8865 m

        #
        # ALS Sensor for Surface Book 3, Surface Laptop 3, Surface Pro 7
        #
        APDS9960 m

        #
        # Other Drivers
        #
        INPUT_SOC_BUTTON_ARRAY m
        SURFACE_3_BUTTON m
        SURFACE_3_POWER_OPREGION m
        SURFACE_PRO3_BUTTON m
        SURFACE_GPE m
        SURFACE_BOOK1_DGPU_SWITCH m

        #
        # Other
        #
        # Prevent a non-fatal "kernel oops" at boot crashing udev
        # (https://github.com/linux-surface/linux-surface/issues/61#issuecomment-579298172)
        PINCTRL_INTEL y
        PINCTRL_SUNRISEPOINT y
        # TODO: Possibly not needed
        # More kernel options for the SAM module
        # (https://github.com/linux-surface/surface-aggregator-module/wiki/Testing-and-Installing)
        SERIAL_DEV_BUS y
        SERIAL_DEV_CTRL_TTYPORT y
        MFD_INTEL_LPSS_PCI y
        INTEL_IDMA64 y
      '';
      }
    ];
  };
}